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https://github.com/zerosnake0/goctx

Get your context value faster
https://github.com/zerosnake0/goctx

context golang

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Get your context value faster

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# goctx



Get your context value faster



## How to use



Replace



```go

v := ctx.Value(key)

```



With



```go

v := goctx.Value(ctx, key)

```



## Benchmark



There will be little difference when there is only 1~2 `context.WithXXX` calls



With 5 `context.WithXXX` calls



|  |  |  |

| --- | --- | --- |

| BenchmarkValue/5/non_parallel/std-8      | 35313684  | 34.2 ns/op |

| BenchmarkValue/5/non_parallel/goctx-8    | 42801348  | 30.0 ns/op |

| BenchmarkValue/5/non_parallel/pure_map-8 | 16655377  | 72.8 ns/op |

| BenchmarkValue/5/parallel/std-8          | 168420460 | 7.09 ns/op |

| BenchmarkValue/5/parallel/goctx-8        | 185695462 | 6.35 ns/op |

| BenchmarkValue/5/parallel/pure_map-8     | 67944997  | 17.6 ns/op |



With 20 `context.WithXXX` calls



|  |  |  |

| --- | --- | --- |

| BenchmarkValue/20/non_parallel/std-8      |  7137338 |  168 ns/op |

| BenchmarkValue/20/non_parallel/goctx-8    | 14623730 | 81.4 ns/op |

| BenchmarkValue/20/non_parallel/pure_map-8 |  5282458 |  235 ns/op |

| BenchmarkValue/20/parallel/std-8          | 42826857 | 27.9 ns/op |

| BenchmarkValue/20/parallel/goctx-8        | 79149823 | 15.1 ns/op |

| BenchmarkValue/20/parallel/pure_map-8     | 22206717 | 53.8 ns/op |



As we can see from the benchmark test, the map implementation is slower than the

standard one, so it is not recommended to use `RegisterValueFunc` to register a

context value function, unless you do not want to see nested stack with `Value` method

call (That's also the reason why `RegisterValueFunc` is kept even it is not fast)